package com.itheima.reggie.controller;

import com.itheima.reggie.common.R;
import com.itheima.reggie.utils.FileUploader;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@Slf4j
@RequestMapping("/common")
@RestController
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    /**
     * 文件上传
     * @param file
     * @return
     */
//    @PostMapping("/upload")
//    public R<String>  upload(MultipartFile file){
//        //临时文件转存到磁盘
//        String originalFilename = file.getOriginalFilename();
//
//        //对原始文件重写命名.防止文件名重复后覆盖
//        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
//        String fileName = UUID.randomUUID().toString() + suffix;
//
//        File dir = new File(basePath);
//        //判断文件是否存在，不存在创建
//        if (!dir.exists()){
//            //不存在，需要创建
//            dir.mkdirs();
//        }
//        //转存到指定文件
//        try {
//            file.transferTo(new File(basePath+fileName));
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
//        return R.success(fileName);
//    }

    /**
     * 文件下载
     * @param name
     * @param response
     */
//    @GetMapping("/download")
//    public void download(String name, HttpServletResponse response){
//        try {
//            //输入流读取文件内容
//            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
//            //输出流，将图片写回到浏览器，在浏览器显示图片
//            ServletOutputStream outputStream = response.getOutputStream();
//
//            response.setContentType("image/jpeg");
//
//            int len = 0;
//            byte[] bytes = new byte[1024];
//            while ((len = fileInputStream.read(bytes)) != -1){
//                outputStream.write(bytes,0,len);
//                outputStream.flush();
//            }
//
//            outputStream.close();
//            fileInputStream.close();
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//        try {
//            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
//            ServletOutputStream outputStream = response.getOutputStream();
//            //io流对拷
//            IOUtils.copy(fileInputStream,outputStream);
//
//            outputStream.close();
//            fileInputStream.close();
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//
//
        @Autowired
        private FileUploader fileUploader;

        @PostMapping("/upload")
        public R<String> upload(MultipartFile file) {
            String fileName = null;
        try {
            fileName = fileUploader.upload(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return R.success(fileName);
    }
}
